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公开(公告)号：US20240429965A1
公开(公告)日：2024-12-26
申请号：US18707266
申请日：2022-11-23
Applicant: TRILLBIT, INC.
Inventor： Bashkar DEO
Abstract: Wireless digital communication of information over sound waves is provided using near near-ultrasonic acoustic (audio)-spectrum. A method includes receiving a modulated data signal generated from coupled direct sequence spread spectrum (DSSS) and orthogonal frequency division multiplexing (OFDM) at a transmitter. The modulated data signal has a phase-shift key (PSK) modulated data signal spread by different Q length chip sequence. The method includes demodulating a synchronized data signal by extracting each OFDM data block having a data symbol and preamble and postamble symbols which were transmitted on an orthogonal sub-carrier with variable Q length chip sequence for multi-user communication over air as a transmission medium. This enables synchronization of communication over the air between transmitters and receivers in multiple user devices in the presence of multiple path propagation and different signal to noise ratios. Simultaneous communication over air between transmitters and receivers in multiple user devices can be done.
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公开(公告)号：US11804870B2
公开(公告)日：2023-10-31
申请号：US17845702
申请日：2022-06-21
Applicant: NEO WIRELESS LLC
Inventor： Xiaodong Li , Titus Lo , Kemin Li , Haiming Huang
CPC classification number: H04B1/707 , H04B1/711 , H04L5/0007 , H04L5/0028 , H04L25/03834 , H04L27/0008 , H04L27/0012 , H04L27/2602 , H04L27/2626 , H04L27/2647 , H04L5/0016 , H04L25/0228 , H04L27/2607 , H04L27/2655
Abstract: In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.
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公开(公告)号：US20220352922A1
公开(公告)日：2022-11-03
申请号：US17845702
申请日：2022-06-21
Applicant: NEO WIRELESS LLC
Inventor： Xiaodong Li , Titus Lo , Kemin Li , Haiming Huang
Abstract: In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.
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公开(公告)号：US11368347B2
公开(公告)日：2022-06-21
申请号：US17092786
申请日：2020-11-09
Applicant: NEO WIRELESS LLC
Inventor： Xiaodong Li , Titus Lo , Kemin Li , Haiming Huang
Abstract: In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.
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5.发明申请公开(公告)号：US20210314020A1
公开(公告)日：2021-10-07
申请号：US17249593
申请日：2021-03-05
Applicant: Battelle Energy Alliance, LLC
Inventor： Hussein Moradi , Behrouz Farhang , Arslan J. Majid
IPC: H04B1/711 , H04B1/7073
Abstract: Various embodiments relate to spread spectrum modulation. A device may include a processor and at least one transmitter. The device may be configured to add a cyclic prefix (CP) to each block of a number of blocks of a direct sequence spread spectrum (DSSS) signal to generate a cyclic prefix-direct sequence spread spectrum (CP-DSSS) signal. Further, the device may be configured to transmit, via a channel, the CP-DSSS signal. Associated methods and communications systems are also disclosed.
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Patent Agency Ranking
公开(公告)号：US11137627B2
公开(公告)日：2021-10-05
申请号：US16236038
申请日：2018-12-28
Applicant: RAM Photonics, LLC
Inventor： Vahid Ataie
Abstract: An apparatus for generating a set of spectral correlation coefficients of an input signal includes: a master laser configured to generate an optical frequency comb signal; a first optical modulator configured to modulate the optical frequency comb signal with an input signal to generate a plurality of spectral copies of the input signal; a dispersive element configured to delay the plurality of spectral copies of the input signal by a wavelength-dependent time delay; a second optical modulator configured to modulate the delayed plurality of spectral copies with a conjugate of the input signal; and an optical comb filter configured to integrate the conjugate modulated plurality of spectral copies of the input signal to generate a set of cyclic autocorrelation coefficients.
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公开(公告)号：US20210083785A1
公开(公告)日：2021-03-18
申请号：US17034175
申请日：2020-09-28
Applicant: ISCO International, LLC
Inventor： Amr Abdelmonem
IPC: H04B17/336 , H04W24/08 , H04W72/08 , H04L27/26 , H04L25/03 , H04B1/04 , H04B1/711 , H04B1/715 , H04J11/00 , H04L25/08 , H04B1/10 , H04B1/71 , H04W24/10 , H04B17/18
Abstract: A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving, via an antenna, a signal generated by a communication device, detecting passive intermodulation interference in the signal, the interference generated by one or more transmitters unassociated with the communication device, and the interference determined from signal characteristics associated with a signaling protocol used by the one or more transmitters. Other embodiments are disclosed.
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公开(公告)号：US10833783B2
公开(公告)日：2020-11-10
申请号：US16782500
申请日：2020-02-05
Applicant: ISCO International, LLC
Inventor： Amr Abdelmonem
IPC: H04B17/336 , H04W24/08 , H04W72/08 , H04L27/26 , H04L25/03 , H04B1/04 , H04B1/711 , H04B1/715 , H04J11/00 , H04L25/08 , H04B1/10 , H04B1/71 , H04W24/10 , H04B17/18 , H04B17/318 , H04B1/7087
Abstract: A system that incorporates aspects of the subject disclosure may perform operations including, for example, receiving, via an antenna, a signal generated by a communication device, detecting passive intermodulation interference in the signal, the interference generated by one or more transmitters unassociated with the communication device, and the interference determined from signal characteristics associated with a signaling protocol used by the one or more transmitters. Other embodiments are disclosed.
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公开(公告)号：US20200322203A1
公开(公告)日：2020-10-08
申请号：US16908067
申请日：2020-06-22
Applicant: NEO WIRELESS LLC
Inventor： Xiaodong Li , Titus Lo , Kemin Li , Haiming Huang
Abstract: In a broadband wireless communication system, a spread spectrum signal is intentionally overlapped with an OFDM signal, in a time domain, a frequency domain, or both. The OFDM signal, which inherently has a high spectral efficiency, is used for carrying broadband data or control information. The spread spectrum signal, which is designed to have a high spread gain for overcoming severe interference, is used for facilitating system functions such as initial random access, channel probing, or short messaging. Methods and techniques are devised to ensure that the mutual interference between the overlapped signals is minimized to have insignificant impact on either signal and that both signals are detectable with expected performance by a receiver.
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公开(公告)号：US10568010B2
公开(公告)日：2020-02-18
申请号：US16096137
申请日：2016-05-12
Applicant: NOKIA SOLUTIONS AND NETWORKS OY
Inventor： Zexian Li , Mikko Saily , Amaanat Ali
Abstract: A technique may include receiving, by a user device in a wireless network, an indication of a set of uplink time-frequency resources to be used for an uplink transmission from the user device to both a master cell and a slave cell, determining, by the user device, a timing advance associated with the master cell, and performing a single transmission, by the user device, of a block of data to both of the master cell and the slave cell via the set of uplink time-frequency resources using the timing advance associated with the master cell.
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